Materials Literature
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The accuracies of two theoretical expressions for thermal boundary resistance are assessed by comparing their predictions to independent predictions from molecular dynamics (MD) simulations. In one expression $({R}_{E})$, the phonon distributions are assumed to follow the equilibrium, Bose-Einstein distribution, while…
Dynamic light scattering (DLS) is an analytical tool used routinely for measuring the hydrodynamic size of nanoparticles and colloids in a liquid environment. Gold nanoparticles (GNPs) are extraordinary light scatterers at or near their surface plasmon resonance wavelength. In this study, we demonstrate that DLS can b…
In natural photosynthesis, organisms optimize solar energy conversion through organized assemblies of photofunctional chromophores and catalysts within proteins that provide specifically tailored environments for chemical reactions. As with their natural counterparts, artificial photosynthetic systems for practical so…
We use nanoparticle-polymer composites to demonstrate the anti-icing capability of superhydrophobic surfaces and report direct experimental evidence that such surfaces are able to prevent ice formation upon impact of supercooled water both in laboratory conditions and in natural environments. We find that the anti-ici…
Abstract Over the past several years, a substantial increase in deep water exploration and production has brought new challenges to corrosion and material technology. The production environments in deep wells normally involve high temperature, high pressure, and sweet/sour gas. These severe conditions require corrosio…
Periplasmic binding proteins (PBPs) constitute a protein superfamily that binds a wide variety of ligands. In prokaryotes, PBPs function as receptors for ATP-binding cassette or tripartite ATP-independent transporters and chemotaxis systems. In many instances, PBPs bind their cognate ligands with exquisite specificity…
We have proposed a kind of nonvolatile resistive switching memory based on amorphous LaLuO3, which has already been established as a promising candidate of high-k gate dielectric employed in transistors. Well-developed unipolar switching behaviors in amorphous LaLuO3 make it suited for not only logic but memory applic…
Abstract The influence of molecular architecture on light‐induced SRG formation was investigated. Polymers with different degree of branching were synthesized by ATRP and functionalized with azobenzene chromophores. The polymers differ only in their architecture – linear, 4‐, 6‐, or 12‐arms stars. The photo‐induced di…
Abstract With standard differential scanning calorimetry (DSC), it is possible to derive calorimetric data for equilibrium or metastable samples. The introduction of temperature-modulated DSC (TMDSC) permits in its quasi-isothermal (non-scanning) mode (TMDC), long-time apparent heat capacity measurements of high preci…
The formalism for, and the values of, aspherical electron scattering factors using relativistic wavefunctions are presented. The parameterizations of electron form factors valid for a full range of scattering vectors from 0.0 to 6.0 Å −1 were obtained for atoms with atomic number 1 (H) to 54 (Xe) by fitting a linear c…
We use magnetic Barkhausen noise to assess the microstructure, hardness, and residual stresses in hardened surface layers. We performed measurements on induction surface-hardened specimens, the thickness of hardened layers being different in each case. A change in the microstructure of the hardened surface layer produ…
Abstract The conformational characteristics of polyelectrolytes end‐grafted on two apposing walls are studied. The monovalent and multivalent counterions are explicitly treated. It is found that the polyelectrolyte brushes undergo a collapse transition in the presence of multivalent counterions at large wall separatio…
Die spontane Bildung selbstorganisierter hochgeordneter zwei- und dreidimensionaler Anordnungen aufrechter Nanostäbe auf großen Übergitterdomänen (siehe Bild) wird beschrieben. Die hexagonal dichte Packung der Nanostäbe senkrecht zum Substrat erinnert an flüssigkristalline Smektisch-B-Phasen. Optische Untersuchungen b…
Abstract This experimental work clarifies the mechanism for the ultra-photostability of indigo carmine by direct observation of a transition state using a sub 5-fs laser pulse. The molecular structural changes during the photoexcited proton-transfer process were traced as the time-dependent instantaneous frequency of…
Macromolecular X-ray crystallography is an important and powerful technique in drug discovery, used by pharmaceutical companies in the discovery process of new medicines. The detailed analysis of crystal structures of protein-ligand complexes allows the study of the specific interactions of a particular drug with its…
Kern aus Gold: Säurebehandelte Au-Pd-Katalysatoren auf einem TiO2-Substrat haben einen definierten goldreichen Kern (blau im Bild) und eine palladiumreiche Schale (grün). Dieser Kern-Schale-Aufbau verbessert die Aktivität des Katalysators für die direkte Synthese von H2O2 aus H2 und O2.
Aufgelockerte Überstruktur: Ein durch Hocherhitzen einer Lösung synthetisierter Pd/CeO2-Katalysator ist drei- bis fünfmal aktiver bei der CH4-Verbrennung als die besten herkömmlichen Palladiumsysteme. Der Katalysator trägt eine geordnete Pd-O-Ce-Überstruktur auf seiner Oberfläche (siehe Bild; der türkise Pfeil verweis…
The camber of asymmetric laminates has been experimentally measured and predicted. Two cases are distinguished: (i) sintering of a viscous layer on a viscous substrate and (ii) sintering of a viscous layer on an elastic substrate. In the first case, particular attention is paid to the microstructure of the shrinking l…
The crystal structures of six new partially fluorinated aryl 1,2,3,5-dithiadiazolyls [ArCNSSN]˙ are reported [Ar = 2,6-F2C6H3 (4); Ar = 3,4-F2C6H3 (5); Ar = 3,5-F2C6H3 (6); Ar = 2,3,6-F3C6H2 (9); Ar = 2,4,6-F3C6H2 (11); and Ar = 3,4,5-F3C6H2 (12)] and compared with three previously reported structures in this series (…
A nanocrystalline (NC) NiFe alloy is presented, in which both highly improved plasticity and strength are achieved by the dynamic-loading-induced deformation mechanisms of de-twinning (that is, reduction of twin density) and significant grain coarsening. This work highlights potential ingenious avenues to exploit the…